Thank you for your message.
Yes, it is possible to connect to the same Host machine from multiple Viewers simultaneously. There shouldn't be any issues caused by connecting from two Viewers at once.
Regarding the license - you can get two Free licenses, using our Free License Key Generator
or get any other license for 2 techs, depending on how many endpoints you need for each tech. For more information on licenses comparison please refer to this page: https://www.remoteutilities.com/buy/licensing.php#compare_licenses
Hope that helps.